They should have got married as soon as Bristol discovered she was pregnant. Shot gun weddings make sense in many cases of out-of-wedlock pregnancy.
I’m sorry to write this, but I have thought from jump that BRistol was bad news. I understand being rebellious — I was — but my rebellion didn’t hurt my family’s mission. She should have married him immediately so as not to damage her mother’s campaign and then gotten a quiet divorce later if it didn’t work out.